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Histo (VM1 Fall) > Exam 2 - Lecture 31 (Female Repro. System) > Flashcards

Exam 2 - Lecture 31 (Female Repro. System) Flashcards

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1
Q

What are the 4 steps to ovary development?

A
  1. Cells from degenerating mesonephric tubule move into the ovary
  2. Germ cells end up in gonadal cords (oocytes)
  3. Oocytes break away from cords and isolate
  4. Each oocyte is surrounded by follicular cells
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2
Q

Where do follicular cells come from?

A

Degeneration of mesonephric tubules

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3
Q

What 5 things does the paramesonephric duct give rise to?

A
  1. Uterine tube
  2. Uterine horn
  3. Uterine body
  4. Cervix
  5. Part of vagina
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4
Q

What 2 things does the urogenital sinus give rise to in females?

A
  1. Vestibule

2. Part of vagina

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5
Q

What is uterus didelphys and what animals have it?

A

2 cervices, 2 vaginas, 2 uteri

Marsupials

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6
Q

What is vagina simplex/uterus duplex and what animals have it?

A

2 uteri, 2 cervical canals, 1 vagina

Rabbits/rodents

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7
Q

What is uterus bicornis and what animals have it?

A

2 uterine horns, 1 uterine body, 1 cervix, 1 vagina

domestic mammals

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8
Q

What animal has the largest uterine body?

A

horse

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9
Q

What is unique to the uteri of primates?

A

They have a body and uterine tubes but no uterine horns

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10
Q

What are the 3 parts of the embryonic external genitalia at the indifferent stage?

A
  1. Genital tubercle
  2. Urogenital folds
  3. Labioscrotal swellings
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11
Q

What does the genital tubercle differentiate into in the male?

A

Penis (glans, corpus cavernosum, corpus spongiosum)

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12
Q

What does the genital tubercle differentiate into in the female?

A

Clitoris (glans, corpus cavernosum, bulb of vestibule)

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13
Q

What do the urogenital folds differentiate into in the male?

A

Ventral aspect of penis

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14
Q

What do the urogenital folds differentiate into in the female?

A

labia of the vulva

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15
Q

What do the labioscrotal swellings differentiate into in the male?

A

scrotum

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16
Q

What do the labioscrotal swellings differentiate into in the female?

A

Doesn’t/poorly develops

Primates = labia majora

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17
Q

What is the default gender is testosterone is absent?

A

Female

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18
Q

What are the 3 steps in development of external female genitalia?

A
  1. Anus separates from cloacal fold
  2. Urogenital fold –> vulvular lips
  3. Genital tubercle –> clitoris
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19
Q

What are the 3 steps in development of external male genitalia?

A
  1. Anus separates from cloacal fold
  2. Genital tubercle begins to form glans and labioscrotal swellings develop on either side
  3. Urogenital fold gets smaller and eventually closes
  4. Genital tubercle –> glans of penis
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20
Q

What is anogenital distance?

A

Distance between anus and whatever structure the genital tubercle becomes (glans penis/clitoris)

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21
Q

What are the 5 malformations of genitalia?

A
  1. Genital hypoplasia
  2. Cryptorchidism
  3. Stenosis of the ducts, abnormal fusion
  4. Hypospadia
  5. Intersex conditions
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22
Q

What is genital hypoplasia?

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A

Few or no germ cells

23
Q

What is cryptorchidism?

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A

Retained testicle (can be uni- or bilateral)

24
Q

What is stenosis of the ducts?

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A

Narrowing of ducts

25
What is hypospadia?
Open urethra
26
What is testicular feminization?
Pseudohermaphrodite - Not enough testosterone was produced OR - Test. receptor defective
27
Differentiation of which gender's genitalia occurs first?
Male
28
What is a freemartin?
Dyzygotic twins
29
What occurs in the vessels of a freemartin?
They anastomose 90% of the time
30
What issues does a freemartin have?
reproductive issues (female most likely affected)
31
Which anatomic region of the repro tract is affected in a freemartin?
Cranial (caudal is normal bc it came from the urogenital sinus)
32
What part of the repro system is affected in a freemartin?
Paramesonephric duct derivatives (they are suppressed)
33
What are the 5 parts of the equine GI tract?
1. Small simple stomach 2. Normal small intestine 3. Cecum of 1 m 4. LONG ascending colon 5. Normal transverse and descending colons
34
What are the parts of the ruminant GI tract?
1. Large stomach (4 parts) 2. Long small intestine 3. Coiled ascending colon 4. Intermediate size cecum 5. Short transverse and descending colons
35
Equines are _____ fermentors.
Hindgut
36
Ruminants are _____ fermentors.
Foregut
37
What do mammals need in order to break down plant cell wall components?
microbes
38
How many chambers of the ruminant stomach are nonglandular and what occurs in them?
3; fermentation
39
How many chambers of the ruminant stomach are glandular and what are they similar to?
1; similar to the simple stomach
40
What are the 5 foregut derivatives?
1. Esophagus 2. Stomach 3. Descending duodenum 4. Liver 5. Pancreas
41
What is not a TRUE foregut derivative but is grouped with them and why?
Spleen; develops in same area and is also supplied by the celiac a.
42
What vessel supplies the foregut and the spleen?
celiac artery
43
What are the 6 midgut derivatives?
1. Ascending duodenum 2. Jejunum 3. Ileum 4. Cecum 5. Ascending colon 6. Transverse colon
44
What vessel supplies the midgut?
cranial mesenteric artery
45
What are the derivatives of the hindgut?
Descending colon
46
What vessel supplies the hindgut?
caudal mesenteric artery
47
What 3 things happen in the differentiation of the simple stomach?
1. Differential growth of the dorsal wall 2. 90 degree rotation of dorsal portion to the left around the longitudinal axis 3. Rotation around a dorsoventral axis (caudal stomach shifts to the right and cranially
48
What does the dorsal mesogastrium become?
Greater omentum
49
What does the ventral mesogastrium become?
Lesser omentum
50
What are the 4 parts of the ruminant stomach?
1. Rumen 2. Reticulum 3. Omasum 4. Abomasum
51
What is the rumen and what side does it face?
Expansion of the fundus; faces the left side
52
What is the reticulum and what side does it face?
Cranioventral pocket of the developing rumen; faces left side
53
What is the omasum and what side does it face?
Bulge along the lesser curvature; faces the right side
54
What is the abomasum and what side does it face?
Remainder of the stomach; position varies

Histo (VM1 Fall) (27 decks)

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